Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b90e2b265c6afcc…

MALICIOUS

PDF

78.1 KB Created: 2021-03-06 04:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2040dfaf5014ecec60297c857629a82b SHA-1: 16073b9fe90edf5974932ff5241348c92b397300 SHA-256: 5b90e2b265c6afccccec8e712908978ca8ff10ab1a81823661d8ce3f256537e8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that appears to be part of a phishing lure, disguised as a sales listing for a lawn mower. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/strik?utm_term=scotts+riding+lawn+mower+17hp+42+for+sale
    • https://cdn.sqhk.co/jimumakevaji/4jbXwih/54959424859.pdf
    • http://jonezuno.22web.org/geely_automobile_annual_report_2016.pdf
    • http://vikiduxa.mywebcommunity.org/multiple_linkage_model_explained.pdf
    • https://cdn.sqhk.co/miwavilusaji/ihbhbrh/jodufivekifunubapasevo.pdf
    • https://cdn.sqhk.co/lokiwejawe/hgjnhji/archery_master_3d_download_uptodown.pdf
    • http://sivelural.mygamesonline.org/kefizi.pdf
    • http://gejulavofanutar.mygamesonline.org/zaxofigan.pdf
    • https://cdn.sqhk.co/rifojimuna/ia5Ehak/vewudiketetaro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/meludav/adipic_acid_dihydrazide_formaldehyde_scavenger.pdf
    • https://s3.amazonaws.com/sefipa/53480710952.pdf
    • http://guvodakar.epizy.com/honda_pressure_washer_parts_gcv190.pdf
    • http://digodimak.rf.gd/does_ignoring_a_man_work.pdf
    • https://s3.amazonaws.com/bulozor/lijejiretoritof.pdf
    • http://zavufomagug.rf.gd/tolimekeroxigezifemuja.pdf
    • https://s3.amazonaws.com/metubevozisul/periodic_table_elements_printable.pdf
    • http://ribebipewafiwas.epizy.com/palopoponabutinorugom.pdf
    • https://s3.amazonaws.com/tigewibejageju/91467909129.pdf
    • https://s3.amazonaws.com/likadojivivofu/neonatal_jaundice.pdf
    • https://s3.amazonaws.com/kimone/94654283846.pdf
    • http://nepowatalol.epizy.com/samsung_blu_ray_player_bd-f5700_manual.pdf
    • http://junebipizazob.epizy.com/87345973187.pdf
    • https://s3.amazonaws.com/bejokazemur/algebra_2_worksheet_quadratic_functions.pdf
    • http://tawimefozogav.epizy.com/what_does_sat_subject_tests_not_offered_on_this_date_mean.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f222.bin
e46a2ef3edd660f3708da4087426c6700c6771a359556a7afa5a1af5c618efb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF222 6116 bytes
font_01_sfnt_off000106ee.bin
39a39d84176a05d325ed0a32e1b5f913120736e138f4d6169a6cd02d3a4c4e1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106EE 10372 bytes

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